简算:4.8+4.8×98+4.8=?8.27×0.99+0.827×0.1=?3.21+32.1×9.9=?3.14×5.2-0.52×1.4=?9.8×98=?好过程可以追分!
简算:
4.8+4.8×98+4.8=?
8.27×0.99+0.827×0.1=?
3.21+32.1×9.9=?
3.14×5.2-0.52×1.4=?
9.8×98=?
好过程可以追分!
4.8+4.8×98+4.8=4.8*2+4.8*98=4.8*[98+2]=480
8.27×0.99+0.827×0.1=0.827*9.9+0.827*0.1=8.27
3.21+32.1×9.9=3.21+3.21*99=3.21*(99+1)=321
3.14×5.2-0.52×1.4=3.14*5.2-5.2*0.14=15.6
9.8×98=9.8*(100-2)=980-19.6=960.4
1、原式=4.8*(1+98+1)=480
2、原式=8.27*(0.99+0.1*0.1)=0.827
3、原式=3.21*(1+10*9.9)=321
4、原式=5.2*(3.14-0.1*1.4)=5.2*3=15.6
5、原式=9.8*(100-2)=980-19.6=960.4
4.8*(1+98+1)=480
8.27*(0.99+0.01)=8.27
3.21*(1+99)=321
5.2*(3.14-0.14)=15.6
9.8*100-9.8*2=960.4
=4.8*(98+1+1)=4.8*100=480
=8.27*(0.99+0.01)=8.27*1=8.27
=32.1*(9.9+0.1)=321
=5.2*(3.14-0.14)=5.2*3=15.6
=9.8*100-9.8*2=980-19.6=960.4
4.8+4.8×98+4.8=4.8 ×(1+98+1)=4808.27×0.99+0.827×0.1=8.27×(0.99+0.01)=8.273.21+32.1×9.9=3.21×(1+99)=3213.14×5.2-0.52×1.4=5.2×(3.14-0.14)=15.69.8×98=9.8×100-9.8×2=980-19.6=960.4
4.8+4.8×98+4.8=4.8*(98+1+1)=4.8*100=480
8.27×0.99+0.827×0.1=8.27*0.99+8.27*.01=8.27*(0.99+0.01)=8.27
3.21+32.1×9.9=3.21+3.21*99=3.21*(1+99)=3.21*100=321
3.14×5.2-0.52×1.4=3.14*5.2-5.2*0.14=5.2*(3.14-0.14)=5.2*3=10.6
9.8×98=9.8*100-9.8*2=980-19.6=960.4
(1):4.8*(98+1+1)=480
(2):0.827*9.9+0.827*0.1=0.827*(9.9+0.1)=8.27
(3):3.21+3.21*99=3.21*(99+1)=321
(4):31.4*0.52-0.52*1.4=(31.4-1.4)*0.52=15.6
(5):9.8*(100-2)=980-19.6=960.4